Hardness, toughness and adhesion are the most important features for processing high hardness materials, high speed and dry cutting tool PVD (Physical Vapor Deposition) coatings. With the development and improvement of materials to be processed, especially superhard and difficult-to-machine materials, materials that are easily stress-hardened, and materials with low thermal conductivity, tool coatings need to have higher thermal stability in addition to the above properties. And oxidative stability. To this end, the new HiPIMS technology is used to develop a new generation of coatings. Compared to conventional coatings, the new coatings are less expensive to process difficult-to-machine materials such as nickel-based alloys and austenitic stainless steels, significantly improving machining parameters and greatly reducing tool wear.
New impetus for machining
In recent years, users have become more interested in the pulse sputtering physical vapor deposition process. HiPIMS is a pulsed physical vapor deposition method developed and patented by the late Russian scientist Vladimir Kouznetsov to achieve high ionization of sputtering targets, representing the latest developments in pulse technology.
Conventional DC sputtering methods increase the ionization of the target metal by increasing the cathode power, which has limitations due to the increased thermal load on the cathode and the substrate to be coated, and HiPIMS solves this problem.
The HiPIMS method uses very high power pulses and only makes a brief impact on the target. A high energy power pulse in the megawatt range is applied to the target to create a high density plasma region (1019 m-3) in front, which is much higher than conventional direct current (DC) sputtering methods. There is then a relatively long "off time" to ensure that the average cathode power is kept at a low level (1-10 kW), allowing the target to cool for a sufficient time and with high process stability.
Since the energy and direction of the positively charged particles hitting the substrate are both advantageously affected by the negative voltage (bias) applied to the substrate, the high target metal ionization rate is relative to conventional methods in making the coating structure and Features have been improved.
Harder and more resilient
The main advantages of HiPIMS coatings compared to conventional physical vapor deposition coatings are: denser coating morphology, high hardness and Young's modulus ratio. The ratio between hardness and Young's modulus is a measure of the toughness of the coating. Ideally, it has a higher hardness and a smaller Young's modulus. The conventional nanostructure (titanium, aluminum) nitrogen coating has a hardness of 25 GPa and a Young's modulus of 460 GPa. The new HiPIMS coating has a hardness of 30 GPa and a Young's modulus of 368 GPa.
Why use HiPIMS technology?
The performance, geometry and coating of the cutting material move forward with great leaps and bounds. Typically, users can double or even double their tool life and cutting data. Targeted development efforts by tool manufacturers and coating suppliers have become possible. In order to continue to provide users with improved potential in the future, CemeCon has adopted a new generation of coating technology and verified HiPIMS: ensuring optimized adhesion, denser coating morphology and lower Young's modulus. Adding hardness at the same time – this is only part of the potential potential of HiPIMS.
In the process of introducing HiPIMS technology into the machining tool industry, CemeCon also created a new generation of coating materials with extraordinary performance. In addition, HiPIMS technology can also integrate existing CemeCon coating units, which means that these machines will be able to produce the latest coatings in the future.
The new generation coating will be named "energy nitride" due to the use of high energy power pulses in the process. Due to the use of super nitrides, the energy nitride series will include a variety of new coating materials as well as coatings that are tested and tested for production. In the long run, HiPIMS has the potential to replace existing physical vapor deposition technologies.
New coating material
The first new coating material (named HPN 1) was unveiled at the AMB show in 2010 and is used primarily in a series of tests for milling tools, drill bits and carbide indexable inserts. Very good results have been obtained in extensive testing of materials, especially difficult-to-machine materials such as stainless steel or inconel. The coating material also performs well in the processing of cast iron materials.
Mini temperature data logger
Mini Temperature Data Logger,Single-Use Mini Usb Temperature Logger,Mini Usb Temperature Data Loggers,Mini Temperature Logger
Chengdu Augus Science Technology Co., Ltd. , https://www.vluckyaugus.com